Carex lemmonii, commonly known as Lemmon’s sedge, is a perennial herbaceous plant endemic to Northern California’s wet meadows, seeps, and marshy areas, particularly in the Pitkin Marsh in Sonoma County. It forms dense or loose clumps of erect stems 16-24 inches tall from short rhizomes. The inflorescence consists of a cluster of 5-7 spikes, which are notable for their appearance during the flowering season in late spring to early summer. The plant is recognized by its distinctive narrow, grass-like leaves and brownish-green flowers.

Lemmon’s sedge is valued for its role in wetland ecology, providing habitat and food for various wildlife species. It is also used in restoration projects due to its ability to thrive in wet conditions and its contribution to soil stabilization. In cultivation, it requires consistently moist to wet soil and can tolerate partial shade, making it suitable for water gardens, rain gardens, and naturalized areas. While it is relatively low-maintenance, it is important to ensure that its habitat requirements are met to prevent decline. Due to its rarity, it is not commonly found in the horticultural trade, but it is of special interest to conservationists and native plant enthusiasts.CC BY-SA 4.0